Summary: This document contains a summary of albedo estimates produced through 'Approach 4' (using an age-based variant of the albedo model), including the figures listed below:
This figure shows several plots related to the final albedo estimates produced by Approach 4.
This figure shows an initial attempt at a mixed effects model analysis.
Correlation matrix of explanatory variables:
Model in R: Random effect is month nested under site ("LocalityName"). Clearcut_Lidar (i.e. "age" of plot) is added as a fixed effect.
model <- lmer(Composite_Albedo ~ Treatment +
Productivity_Index +
Canopy_Height_MAD +
Clearcut_Lidar +
Moose_Density +
Red_Deer_Density +
Roe_Deer_Density +
(1 | LocalityName/Month),
data = model_data)
Model Output:
| Â | Composite_Albedo | ||
|---|---|---|---|
| Predictors | Estimates | CI | p |
| (Intercept) | 0.31960 | 0.25181 – 0.38739 | <0.001 |
| Treatment [open] | -0.00108 | -0.00185 – -0.00032 | 0.006 |
| Productivity_Index | -0.04974 | -0.13274 – 0.03327 | 0.240 |
| Clearcut_Lidar | -0.00673 | -0.01162 – -0.00185 | 0.007 |
| Moose_Density | 0.00112 | 0.00044 – 0.00180 | 0.001 |
| Red_Deer_Density | 0.00066 | -0.00117 – 0.00249 | 0.478 |
| Roe_Deer_Density | -0.00247 | -0.00409 – -0.00085 | 0.003 |
| Random Effects | |||
| σ2 | 0.00 | ||
| τ00 Month:LocalityName | 0.01 | ||
| τ00 LocalityName | 0.00 | ||
| ICC | 1.00 | ||
| N Month | 12 | ||
| N LocalityName | 37 | ||
| Observations | 888 | ||
| Marginal R2 / Conditional R2 | 0.067 / 0.998 | ||
Exploring Model Fit:
This section shows relevant data and albedo estimates for each SustHerb site.
## Site: bratsberg - Age: 15 years
## Site: didrik_holmsen - Age: 10 years
## Site: drangedal1 - Age: 12 years
## Site: drangedal3 - Age: 9 years
## Site: drangedal4 - Age: 9 years
## Site: eidskog - Age: 7 years
## Site: fet_3 - Age: 7 years
## Site: fritsoe1 - Age: 8 years
## Site: fritsoe2 - Age: 12 years
## Site: furesdal - Age: 10 years
## Site: halvard_pramhus - Age: 8 years
## Site: hi_tydal - Age: 10 years
## Site: kviteseid1 - Age: 13 years
## Site: kviteseid2 - Age: 12 years
## Site: kviteseid3 - Age: 17 years
## Site: malvik - Age: 14 years
## Site: namdalseid_1kub - Age: 4 years
## Site: nome_cappelen1 - Age: 11 years
## Site: nome_cappelen2 - Age: 11 years
## Site: notodden3 - Age: 15 years
## Site: notodden5 - Age: 10 years
## Site: notodden6 - Age: 14 years
## Site: nsb_verdal - Age: 9 years
## Site: selbu_flub - Age: 11 years
## Site: selbu_kl - Age: 12 years
## Site: selbu_sl - Age: 13 years
## Site: singsaas - Age: 10 years
## Site: sl_tydal - Age: 10 years
## Site: stangeskovene_aurskog - Age: 10 years
## Site: stangeskovene_eidskog - Age: 8 years
## Site: steinkjer_1bbb - Age: 6 years
## Site: steinkjer_2bbb - Age: 7 years
## Site: stig_dahlen - Age: 9 years
## Site: sub_namdalseid - Age: 6 years
## Site: truls_holm - Age: 9 years
## Site: verdal_1vb - Age: 10 years
## Site: verdal_2vb - Age: 12 years